A.開區(qū)間(0,1) B.半開半閉區(qū)間(0,1] C.閉區(qū)間[0,1] D.半開半閉區(qū)間[0,1)
A.2/15 B.3/10 C.2/9 D.1/15
A.1/8 B.1/6 C.1/4 D.1/2